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E. F. KITToEeL F. nnTHERHuon.

S.,haft for Dre-Washer.

` Patented April 6, 1875..

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WITNESS Es INVENTORS w ATToRN EYS THE GRAPHIC COAPHOTOrLlTILSQdH PARKPLAGE,NY.

EDWARD F. KITTOE AND FRED BROTHERHOOD, OF CHA RLESTON, S. O.

IMPROVEMENT IN SHAFTS FOR CR-WASHERS.

Specification forming part of Letters Patent No. E?, dated April 6, 1875application filed I March 9, 1875.

To all whom it may concern:

Be it known that we, EDWARD FREDERICK KITTOE and FRED BROTHERHOOD, ofCharleston, county ofOharleston, South Carolina, have invented anImproved Shaft for Ore-Washin g and other Machines, of which thefollowing is a specification:

The object of our invention is a shaft for orewashing machines,pug-mills, Sto., which shall be stronger, more rigid, and lighter inweight than those heretofore used, and-to which the radial blades orarms may be readily applied; and this object I attain by constructingthe shaft in the manner illustrated in the accompanying drawing, inwhich- Figure lis a transverse section, showing one form of shaft madein accordance with our invention Fig. 2, an exterior view, partly insection, of one end of the shaft 5 Figs. 3 and 4, detached views ofparts of the shaft; and Figs. 5 and 6, views, showing a modification.

The stem J of the shaft is made by riveting together the anges of anumber of anged metal strips, a, to form a tube with externallongitudinal ribs c, such a tube being known as a Phoenix Column.77

The radiating arms or blades D are secured to the shaft between the ribsc c, being arranged, in the present instance, on a line winding spirallyround the. shaft. To facilitate the attachment of the blades to theshaft each blade may be secured to or form part of a block or strip ofwood or metal, lying between or resting on the ribs o c, and dividedinto sections O O, which are arranged either at intervals withintervening spaces, or in contact with each other, as shown in Fig. 2.The blades are secured to the stein by bolts b b, each of which crossesthe axis of the shaft and passes through the sections at opposite sidesthereof.

When the sections are of metal the bolts pass through hollow lugs c atthe inner sides ofthe sections, which lugs afford bearings for thesections upon the faces of the column, and also thicken the sections atthese points, so that they may be countersunk to receive the heads andnuts of the bolts, which are, therefore, less liable to wear away thanwhen exposed.

When thc sections are of metal, dovetailed sockets t' may be formedtherein to receive dovetailed ribs n of the blades or arms D, which maytherefore be readily applied and removed, thin plates or strips beingdriven into the sockets, so as to wedge the blades in their places afteradjustment, as shown ink Fig. 4.

When metal sections are not used the blades are bolted directly to thestem between the ribs c c, or to wooden sections O C, lying between theribs, as shown in Fig. 5. In this case each bolt passes through anopening in a flange, o, at-one side ofa tooth, through the stem, andthrough a thin metal washer or distance-piece, t, arranged betweenadjacent blades at the opposite side of the stem, thus securing both thesections and the teeth in their places.

Instead of forming the flanges o in one piece with the blades they maybe made separate, with sockets to receivedovetailed ribs of detachableteeth, as shown in Fig. 6.

To prevent the access of water and grit below the wood sections, stripsf of metal are arranged to cover each rib o and overlap the faces of theadjacent sections, Fig. 5, to which they are secured by screws or nails.j

The shaft, constructed as described, is adapted to be used in pug-mills,:mixing machines, Sto., but is specially serviceable in ore-washingmachines, owing to its rigidity and light weight, the ribs c c impartinggreat stiffness when comparatively thin met-al is used for the plates a,and the bolt b,when used for securing the blades, imparting increasedrigidity.

One of the most important results of the above-described construction ofthe shaft is the facility with which the blades may be arranged in anydesired position, it only being necessary, in order to change them, toremove the bolts and again apply them after the readjustment of theblades.

It will be apparent that the hollow column or stem may be of any desiredsectional form, andv that the arrangement of the sections O may bealtered, and the mode of securing the blades varied without departingfrom the main features of our invention.

1. A shaft for ore-washing machines, &c., consisting of a tubularcolumn, J, composed of lan ged plates a, riveted together at the edges,and blocks D, secured to the column between the ribs formed by theanges, as set forth.

2. The combination, in a shaft for ore-washing machines, of a hollowribbed column, J, sections C, confined to the column between the ribs,and blades D, secured to or forming part of said sections, as set forth.

3. The combination of the column J, blades D, and bolts b, passingthrough the column and secnrin g the blades, as described.

In testimony whereof We have signed our names to this specification inthe presence of two subscribing witnesses.

E. F. KITTOE. F. BROTHERHOOD.

Witnesses:

FREDERICK I. SMITH, W. M. AIKEN.

